/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package app.metatron.discovery.query.druid.funtions;

public class RunningSumFunc {

  private static final String FUNC_NAME = "$sum";

  String expr;

  public RunningSumFunc(String expr) {
    this.expr = expr;
  }

  public String toExpression() {
    StringBuilder sb = new StringBuilder();
    sb.append(FUNC_NAME).append("(");
    sb.append(expr);
    sb.append(")");

    return sb.toString();
  }
}
